function resizeImg(imageid,w,h){

	var maxw = w
	var maxh = h
	
	var imagen = document.getElementById(imageid)

	if (imagen.width>maxw || imagen.height>maxh) { 
		var scale = Math.min((maxw/imagen.width),(maxh/imagen.height), 1 )
		var new_width = Math.floor(scale*imagen.width)
		var new_height = Math.floor(scale*imagen.height)
		imagen.width = new_width
		imagen.height = new_height
	} 
}